Shares held of record by Theodore W. Ullyot and Jennifer L. Ullyot, Co-Trustees of The Ullyot 2012 Irrevocable Trust, the beneficiaries of which include the reporting person's minor children.

(
3)

Represents the number of shares acquired upon conversion of Class B Common Stock to Class A Common Stock in connection with the exercise of vested stock options.

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4)

Represents the number of shares that were acquired upon conversion of Class B Common Stock to Class A Common Stock in connection with the net settlement of restricted stock units (the "RSUs") listed in Table II, based on a price of $26.63 per share, which represented the closing price of the issuer's Class A Common Stock on December 31, 2012.

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5)

The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

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6)

The option vested as to 1/5th of the total shares on October 20, 2009, after which 1/60th of the total shares vest monthly, subject to continued service through each vesting date. In connection with certain estate planning transfers, options to purchase 400,000 vested shares are held by Theodore W. Ullyot, as Trustee of the Theodore W. Ullyot 2011 Annuity Trust dated December 13, 2011.

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7)

Each RSU represents a contingent right to receive 1 share of the issuer's Class B Common Stock upon settlement.

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8)

The RSUs were granted with both (a) a liquidity event-based vesting condition and (b) a service-based vesting condition, both of which conditions must be satisfied in order for the RSUs to vest. The liquidity event-based vesting condition was satisfied on November 17, 2012. Pursuant to the terms of the RSU award, the service-based vesting condition was satisfied as to 1/5th of the total number of shares on November 1, 2009 and then 1/60th of the total number of shares vest monthly thereafter, subject to continued service through each vesting date.

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9)

Represents shares of Class B Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of the RSUs and does not represent a sale by the reporting person.

(
10)

Represents shares of Class B Common Stock that have been converted to Class A Common Stock in connection with the net settlement of the RSUs.